Vulnerability Description
The KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 4.1.2. This is due to the `patientSocialLogin()` function not verifying the social provider access token before authenticating a user. This makes it possible for unauthenticated attackers to log in as any patient registered on the system by providing only their email address and an arbitrary value for the access token, bypassing all credential verification. The attacker gains access to sensitive medical records, appointments, prescriptions, and billing information (PII/PHI breach). Additionally, authentication cookies are set before the role check, meaning the auth cookies for non-patient users (including administrators) are also set in the HTTP response headers, even though a 403 response is returned.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://plugins.trac.wordpress.org/browser/kivicare-clinic-management-system/tru
- https://plugins.trac.wordpress.org/browser/kivicare-clinic-management-system/tru
- https://plugins.trac.wordpress.org/changeset/3467409/
- https://www.wordfence.com/threat-intel/vulnerabilities/id/8d22448b-aa8e-4775-b7c
FAQ
What is CVE-2026-2991?
CVE-2026-2991 is a vulnerability with a CVSS score of 7.3 (HIGH). The KiviCare – Clinic & Patient Management System (EHR) plugin for WordPress is vulnerable to Authentication Bypass in all versions up to, and including, 4.1.2. This is due to the `patientSocialLogin(...
How severe is CVE-2026-2991?
CVE-2026-2991 has been rated HIGH with a CVSS base score of 7.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-2991?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.